Help me identify this brake drum

See post 6 of the link below for 10"X1.75" drum and axle re-drill pictures.
Drum register id is 2.312"
Just throwing a tape across the axle register could lead to believe it's 2.250". Probably should at least use a caliper. It's difficult to get a good measurement with studs installed.

http://www.forabodiesonly.com/mopar/showthread.php?t=284482


The Moser's I have, A30-CST-A45 - A-Body, 8 3/4" Rear Axle Shafts, Stock A-Body Drum Brake (Redrilled) -- 30 Spline, register 2.300" (best dimension I can get with caliper and the studs installed). They do not have the markings the axle in this thread shows.